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Title: Increasing jet entrainment, mixing and spreading

A free jet of air is disturbed at a frequency that substantially matches natural turbulences in the free jet to increase the entrainment, mixing, and spreading of air by the free jet, for example in a room or other enclosure. The disturbances are created by pulsing the flow of air that creates the free jet at the desired frequency. Such pulsing of the flow of air can be accomplished by sequentially occluding and opening a duct that confines and directs the flow of air, such as by rotating a disk on an axis transverse to the flow of air in the duct. 11 figs.
Inventors:
Issue Date:
OSTI Identifier:
7164272
Assignee:
Midwest Research Inst., Kansas City, MO (United States) PTO; EDB-94-132472
Patent Number(s):
US 5338254; A
Application Number:
PPN: US 7-995146
Contract Number:
AC02-83CH10093
Resource Relation:
Patent File Date: 22 Dec 1992
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; JETS; AUGMENTATION; AIR FLOW; DUCTS; ENTRAINMENT; MIXING; FLUID FLOW; GAS FLOW; 420400* - Engineering- Heat Transfer & Fluid Flow